<template>
  <div class="bottom-bar">
    <CheckButton :is-checked="isSelectAll" class="check-button" @click.native="checkClick"></CheckButton>
    <span>全选</span>
    <span class="price">合计: {{totalPrice}}</span>
    <span class="calculate" @click="calcClick">去计算({{checkLength}})</span>
  </div>

 
</template>

<script>
import CheckButton from 'components/content/checkButton/CheckButton'
import {mapGetters} from 'vuex'

export default {
  name:'CartBottomBar',
  components:{
    CheckButton
  },
  computed:{
    ...mapGetters(['cartList']),
    totalPrice(){
      return '￥' + this.cartList.filter(item => {
        return item.checked
      }).reduce((preValue, item) => {
        return preValue + item.price * item.count
      },0).toFixed(2)
    },
    checkLength(){
      return this.cartList.filter(item => item.checked).length
    },
    isSelectAll(){
    //  return !(this.cartList.filter(item => !item.checked).length)
    if (this.cartList.length === 0) return false
     return !this.cartList.find(item => !item.checked)
    }
  },
  methods: {
    checkClick(){
      if (this.isSelectAll) {
        this.cartList.forEach(item => item.checked = false)
        
      }else{
        this.cartList.forEach(item => item.checked = true)
      }
    },
    calcClick(){
      if (!this.isSelectAll) {
        this.$toast.show('请选择购买的商品', 2000)
      }
    }
  },
}
</script>

<style scoped>
 .bottom-bar{
    width: 100%;
    height: 44px;
    background-color: #eee;
    position: fixed;
    bottom: 49px;
    left: 0;
    box-shadow: 0 -2px 3px rgba(0, 0, 0, .2);
    font-size: 14px;
    color: #888;
    line-height: 44px;
    padding-left: 35px;
    box-sizing: border-box;
 }

 .bottom-bar .check-button{
  position: absolute;
    line-height: 0;
    left: 12px;
    top: 13px;
 }


 
 .bottom-bar .price{

   margin-left: 15px;
    font-size: 16px;
    color: #666;
 }

 .bottom-bar .calculate{

    background-color: orangered;
    color: #fff;
    width: 100px;
    height: 44px;
    text-align: center;
    line-height: 44px;
    float: right;
    border-radius: 6px;
 }
</style>